Portable speaker system



FIG. 1 is a perspective view of a portable speaker system, showing the new design;

FIG. 2 is a perspective view thereof, illustrated with a retractable cable in an extended position.

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left-side elevational view thereof;

FIG. 6 is a right-side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines showing a retractable cable in FIG. 2 depict environmental matter and form no part of the claimed design. 

CLAIM I claim the ornamental design for a portable speaker system, as shown and described. 